﻿var vcity = { 11: "北京市", 12: "天津市", 13: "河北省", 14: "山西省", 15: "内蒙古自治区",
    21: "辽宁省", 22: "吉林省", 23: "黑龙江", 31: "上海市", 32: "江苏省",
            33: "浙江省", 34: "安徽省", 35: "福建省", 36: "江西省", 37: "山东省", 41: "河南省",
            42: "湖北省", 43: "湖南省", 44: "广东省", 45: "广西自治区", 46: "海南省", 50: "重庆市",
            51: "四川省", 52: "贵州省", 53: "云南省", 54: "西藏自治区", 61: "陕西省", 62: "甘肃省",
            63: "青海省", 64: "宁夏自治区", 65: "新疆自治区", 71: "台湾省", 81: "香港特别行政区", 82: "澳门特别行政区", 91: "国外"
        };

        var errorinfor="";
checktheform = function(card,pro)
{
    //是否为空
    if(card === '')
    {
        errorinfor ='身份证号不能为空';
        return false;
    }
    //校验长度，类型
    if(isCardNo(card) === false)
    {
        errorinfor = '身份证号码不正确';
        return false;
    }
    //检查省份
    if (checkProvince(card, pro) === false)
    {
        errorinfor = '身份证的省份不正确';
        return false;
    }
    //校验生日
    if(checkBirthday(card) === false)
    {
        errorinfor = '身份证的生日不正确';
        return false;
    }
    //检验位的检测
    if(checkParity(card) === false)
    {
        errorinfor = '身份证的检验位不正确';
        return false;
    }
    return true;
};

//检查号码是否符合规范，包括长度，类型
isCardNo = function(card)
{
    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
    var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
    if(reg.test(card) === false)
    {
        return false;
    }
    return true;
};
//取身份证前两位,校验省份
checkProvince = function (card, pro) {
    var province = card.substr(0, 2);
    if (vcity[province] == undefined) {
        return false;
    }
    if (pro) {
        if (vcity[province] != pro)
            return false;
    }
    return true;
};
//检查生日是否正确
checkBirthday = function(card)
{
    var len = card.length;
    //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
    if(len == '15')
    {
        var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
        var arr_data = card.match(re_fifteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = new Date('19'+year+'/'+month+'/'+day);
        return verifyBirthday('19'+year,month,day,birthday);
    }
    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    if(len == '18')
    {
        var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
        var arr_data = card.match(re_eighteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = new Date(year+'/'+month+'/'+day);
        return verifyBirthday(year,month,day,birthday);
    }
    return false;
};
//校验日期
verifyBirthday = function(year,month,day,birthday)
{
    var now = new Date();
    var now_year = now.getFullYear();
    //年月日是否合理
    if(birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day)
    {
        //判断年份的范围（3岁到100岁之间)
        var time = now_year - year;
        if(time >= 3 && time <= 100)
        {
            return true;
        }
        return false;
    }
    return false;
};
//校验位的检测
checkParity = function(card)
{
    //15位转18位
    card = changeFivteenToEighteen(card);
    var len = card.length;
    if(len == '18')
    {
        var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
        var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
        var cardTemp = 0, i, valnum;
        for(i = 0; i < 17; i ++)
        {
            cardTemp += card.substr(i, 1) * arrInt[i];
        }
        valnum = arrCh[cardTemp % 11];
        if (valnum == card.substr(17, 1))
        {
            return true;
        }
        return false;
    }
    return false;
};
//15位转18位身份证号
changeFivteenToEighteen = function(card)
{
    if(card.length == '15')
    {
        var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
        var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
        var cardTemp = 0, i;
        card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6);
        for(i = 0; i < 17; i ++)
        {
            cardTemp += card.substr(i, 1) * arrInt[i];
        }
        card += arrCh[cardTemp % 11];
        return card;
    }
    return card;
}